Question 1:
Give two examples of alloy containing copper metal.
Answer:
Bronze / Brass / Duralumin
Give two examples of alloy containing copper metal.
Answer:
Bronze / Brass / Duralumin
Question 2:
Draw the arrangement of atoms in an alloy and a pure metal, then relate the arrangement of the atoms to the properties of pure metal.
Answer:
• Pure metal: atoms in the pure metal are arranged in an orderly manner and in layers. The layer of atoms in pure metal easily slides over each other when a force is applied.
• Alloy: The difference in size of foreign atom disrupts the orderly arrangement of metals. The layer of atoms in alloy is difficult to slide over each other when a force is applied. Therefore, alloy is harder.
Draw the arrangement of atoms in an alloy and a pure metal, then relate the arrangement of the atoms to the properties of pure metal.
Answer:
• Pure metal: atoms in the pure metal are arranged in an orderly manner and in layers. The layer of atoms in pure metal easily slides over each other when a force is applied.
• Alloy: The difference in size of foreign atom disrupts the orderly arrangement of metals. The layer of atoms in alloy is difficult to slide over each other when a force is applied. Therefore, alloy is harder.
Question 3:
What alloy is used to make the body of an aeroplane? Explain why the alloy is chosen.
Answer:
Duralumin.
Duralumin is strong, light and resistant to corrosion.
What alloy is used to make the body of an aeroplane? Explain why the alloy is chosen.
Answer:
Duralumin.
Duralumin is strong, light and resistant to corrosion.